The purpose of this experiment is to measure acceleration on a freely falling object assuming the only force acting on the object is gravitational force. Theory All dense objects in free fall have the same acceleration‚ which is known as the acceleration due to gravity. The value of acceleration due to gravity is approximately 9.80 m/s2. In this experiment‚ a vertical stand with an electromagnet at the top for holding and then releasing of the falling body‚ called the plummet. The plummet
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Niels Bohr Full Name: Niels Henrik David Bohr Date of Birth: 7th October‚ 1885 Place of Birth: Copenhagen‚ Denmark Date of Death: 18th November‚ 1962 A young Niels Bohr while he was studying at Gammelholm Grammar School Niels Bohr was a prominent physicist in his time. He made large contributions to the field of quantum mechanics and also in the understanding of atomic structure. Niels Bohr worked on the well known Manhattan Project‚ and received the Nobel Prize for Physics in 1922. Niels Bohr
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Table of Contents Text content Page a) Objective.................................................................................................2 b) Introduction.............................................................................................2 c) Material & Apparatus..............................................................................3 d) Procedure...........
Free Heat transfer Heat Temperature
Synthesis of Dulcin Objective: The main objective of this lab is to gain experience at a typical synthesis and semi-microscale recrystallization. Discussion Questions: 1) How fast should the temperature be raised when determining a melting point? When can the temperature be raised more quickly? 2) If there is an Impurity present in a sample‚ what is the effect on the melting point? 3) Explain why a) salt‚ spread on roads in the winter‚ helps prevent icing in‚ for instance‚ southern
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Fluid mechanics is the branch of physics that studies fluids (liquids‚ gases‚ and plasmas) and the forces on them. Fluid mechanics can be divided into 1) fluid statics‚ the study of fluids at rest; 2) fluid kinematics‚ the study of fluids in motion; 3) fluid dynamics‚ the study of the effect of forces on fluid motion. Fluid Mechanics Overview Fluid is a substance that is capable of flowing. It has no definite shape of its own. It assumes the shape of its container. Liquids and gases are
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Absorption & Emission of Light Stimulated Absorption & Emission‚ Spontaneous Emission E2 Incident radiation hν hν Emitted & transmitted radiation E1 Resonance condition E2-E1=hν • Rate of stimulated emission is: −dN1/dt = N1B1->2 ρ(ν) • Rate of absorption is the sum of the rated due to stimulated emission and spontaneous emission: −dN2/dt = N2B2->1 ρ(ν) + N2A2->1 where B1->2 is the Einstein transition probability for induced absorption‚ B2->1 is the Einstein transition probability
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NS 10.5 (pg 1 of 2) Heating and Cooling Curves What happens when we heat a sample of ice that is initially at -15°C? The addition of heat causes the temperature of the ice to increase. As long as the temperature is below 0°C‚ the sample remains frozen. When the temperature reaches 0°C (the melting point of water)‚ the ice begins to melt. Because melting is an endothermic process‚ the heat we add at 0°C is used to convert ice to water and the temperature remains constant until all the ice
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1. Characteristic Loads-Characteristics‚ Importance‚ Applications Actions By E.C. An action (F) is a force (load) applied to the structure (direct action ) or an imposed deformation ( indirect action ) ex. Temperature effects. Actions are classified: a) by variation in time permanent actions G ( self-weight of structure). b) by their spatial variations: fixed actions ( self weight ) variable actions Q wind loads/snow. free actions which results in different actions accidental actions
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Heat energy is transferred from homes by conduction through the walls‚ floor‚ roof and windows. It is also transferred from homes by convection. For example‚ cold air can enter the house through gaps in doors and windows‚ and convection currents can transfer heat energy in the loft to the roof tiles. Heat energy also leaves the house by radiation through the walls‚ roof and windows. http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway_pre_2011/energy_home/1_keeping_homes_warm2.shtml Visited
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Intermolecular forces exist between independent particles‚ such as atoms‚ ions‚ or molecules. They can be forces of either attraction or repulsion. The amount of charge‚ how it is distributed‚ and the length of time that a charge distribution exists can affect the strength of intermolecular forces. And despite having variable force strengths‚ all intermolecular forces are considered weak compared to chemical bonds‚ or intramolecular forces. Chemical bonds are not only stronger; they are also more
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